
*{
    margin:0;
    padding: 0;
}
.nav{
    height: 50px;
    background-color: pink;
    text-align: center;
    color: red;
    font-size: 20px;
    line-height: 50px;
}
.container{
    width: 1300px;
    margin:0 auto;
}
.flag .container{
    height: 40px;
    background-color:bisque;
}

.banner{
    height: 40px;
    background-color:brown;
}
.banner .container{
    height: 40px;
    background-color:blueviolet;
    display: flex;
    justify-content: space-between;
}
.banner .container .left{
    width: 900px;
    display: flex;
    justify-content: space-between;
}
.banner .container li{
    list-style: none;
    font-size: 20px;
    line-height: 40px;
}
.banner .container .right input{
    outline: none;
    border: none;
    height: 30px;
    margin-top: 5px;
}

/* 图书信息 */
.book .container{
    /* height: 1000px; */
    display: flex;
}
.book .container .left{
    width: 800px;
    background-color:aqua;
}
.book .container .right{
    width: 500px;
    background-color: blueviolet;
}
.book .container .left ul{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
}
.book .container .left li{
    width:150px;
    height:150px;
    font-size: 18px;
    list-style: none;
    padding: 5px;
    background-color:chartreuse;
    margin-top: 10px;
    margin-right: 15px;
    position: relative;
    text-align: center;
} 
.book .container .left li .tag{
    font-weight: 800;
    font-size: 18px;
}
.book .container .left li .auth{
    font-size: 16px;
}
.book .container .left img{
    width:100px;
    height:100px;
    
}
.book .container .left li .cat{
    position: absolute;
    top:0;
    left:0;
    background-color: rgba(0,0,0,.6);
    color: white;
}